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3 years ago

2 reasons why recycling aluminium is a good idea

Chemistry

2 answers:

RideAnS [48]3 years ago

8 0

Answer:

1. it saves energy, time, money and precious natural resources

2. it generates jobs and helps to pay for community services that make life better for millions of people.

Explanation:

Mazyrski [523]3 years ago

7 0

Answer:

Recycling aluminium saves around 95% of the energy needed to make the metal from raw materials. Along with the energy savings, recycling aluminium saves around 95% of the greenhouse gas emissions compared to the 'primary' production process.

Explanation:

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Setler [38]

The answer would be 3 cm. you round down to the nearest whole number when it is less than 5. you round up when it is 5 or more.

3 0

2 years ago

Read 2 more answers

Write the balanced half-equation describing the oxidation of mercury to hgo in a basic aqueous solution. Please include the stat

Cloud [144]

Answer:

$Hg^0+2OH^-\rightarrow Hg^{2+}O+H_2O+2e^-$

Explanation:

Hello,

In this case, mercury (II) oxide (HgO) is obtained via the reaction:

$Hg(l)+O_2\rightarrow HgO$

Nonetheless, since it is a reaction carried out in basic solution, mercury's half-reaction only, must be:

$Hg^0+2OH^-\rightarrow Hg^{2+}O+H_2O+2e^-$

Thus, it is seen that OH ionis should be added due to the basic aqueous solution considering that 2 electrons are transferred from 0 to 2 in mercury.

Best regards.

8 0

3 years ago

According to Chargaff's Rule, if a segment of DNA contains 60 cytosine bases out of a total of 300 bases how many thymine bases

bija089 [108]

Answer:

90 Thymine bases

Explanation:

Chargaff's rules states that in the DNA of any organism, the amount of purine and pyrimidine bases must be in a 1:1 ratio. This means that the amount of Adenine and Guanine bases (purines) should be equal with their complementary pairs of Thymine and Cytosine bases respectively (pyrimidines). (A = T) + (G = C) = 100

Hence, according to this question, if there are 60 cytosine bases, this means that there will be 60 Guanine bases. 60 C + 60 G = 120 pyrimidines

300 total bases - 120 pyrimidine bases = 180 purine bases.

180/2 = 90 equal bases of Adenine and Thymine. Hence, Thymine bases will be 90.

3 0

2 years ago

A sample of seawater consists of water, sodium ions, chloride ions, and several other dissolved salts. These ions and salts are

stellarik [79]

Answer:

Mixture, homogeneous mixture, solution

Explanation:

A mixture is defined as a substance which is made by physical combination of two or more substance.

As in sea water, more than two substance are present, therefore is considered as mixture.

A mixture is considered as homogeneous mixture, if it has same proportion of components through out the mixture. In sea water proportions of all the components are same, therefore, its is also a homogeneous mixture.

In solution, solute is dissolved in a solvent and the concentration of the solute is same through out the solution.. In sea water, sodium ions, chloride ions, and several other salts are dissolved in water. Therefore, water is considered as solvents and components present are considered as solute.

so, sea water can also considered as solution.

Among the given options, 1, 3 and 4 are correct

So, sea water is considered as mixture, homogeneous mixture and solution.

6 0

2 years ago

How many significant figures are there in this expression 0.001050

WITCHER [35]

4 sig fig in that expression

4 0

2 years ago

Read 2 more answers